java方面：private属性,没有set方法，只有get方法，如何给这个属性赋值？

Question

如题；

public class Foo {

private String readwrite;   // with getter and setter
private String readonly;    // with getter

public String getReadwrite() {
    return readwrite;
}

public void setReadwrite(String readwrite) {
    this.readwrite = readwrite;
}

public String getReadonly() {
    return readonly;
}

}

当我在其他类中调用Foo时，想给其readonly赋值，怎么办？

Answer 1

用反射吧，然后设置setAccessible为true就可以了，如下：
public class Test {

private String readOnly;
public String getReadOnly() {
    return readOnly;
}
public static void main(String[] args) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException {
    Test t = new Test();
    Field f = t.getClass().getDeclaredField("readOnly");
    f.setAccessible(true);
    f.set(t, "test");
    System.out.println(t.getReadOnly());
}

}